Hi,
I am trying to port our prorpietary real time kernel(68K)
onto mpc860. I have some doubts..
1. If we have a user stack and an Supervisor stack, then
where should the Supervisor stack pointer be stored- ??? IS
SPRG0 register, a convention for Storing Supervisor stack pointer.
2. Which are the registers that i need to store during
interrupt processing.
3. MSR[PR] bit in Machine Status register - Is it set by hardware or is
it the Operating systems response to set it while it is switching to user mode.
Thanx in Advance,
-Shubha